Novel explosion-proof fan control circuit

• Main Authors: ZHANG LIANG, GAO DEMING
• Format: Patent
• Language: Chinese; English
• Published: 21.11.2023
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The utility model belongs to the technical field of gas pressurization station related devices, and relates to a novel explosion-proof fan control circuit, which comprises a circuit breaker QF, a contactor KM, a thermal relay RF, a control unit and a fan M. A three-phase power supply L1 is connected to the control unit, and the control unit is connected with a coil of the contactor KM and then is connected with a power supply N pole to form a loop. The three-phase power supply L1, the three-phase power supply L2 and the three-phase power supply L3 are connected with the circuit breaker QF, the circuit breaker QF is connected with a normally open switch of the contactor KM, the normally open switch of the contactor KM is connected with the thermal relay RF, and the thermal relay RF is connected with the fan M. According to the utility model, manual intervention is not needed, the fan can be automatically started and stopped, a worker can be automatically sensed to control the fan to be started and stopped, ene